Answer:
A man goes out in heavy rain with nothing to protect him from it. His hair doesn't get wet. How does he do that?
The buyer doesn’t want it, the producer doesn’t need it and the user doesn’t know their using it.
How do you spell hard water with only three letters?
They are the group who manages the winged engines of war.
What has fingers and a thumb but no hand?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?